<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script type="text/javascript" src="../js/vue.js"></script>
    <title>姓名案例_计算属性实现简写</title>
</head>
<body>
    <!-- 
     -->
    <div id="root">
        姓：<input type="text" v-model="firstName"/></br>
        名：<input type="text" v-model="lastName"/></br>
        <span>全名：{{nameMerge}}</span></br>

    

    </div>
    <script type="text/javascript">
        const vm = new Vue({
            el:"#root",
            data(){
                return {
                    firstName: '张',
                    lastName: '三',

                }
            },
            computed:{
                //完整写法
                // nameMerge:{
                //     get(){
                //         console.log('get被调用')
                //         console.log(this)
                //         return this.firstName + '-' + this.lastName
                //     },
                //     set(value){
                //         const arr = value.split('-')
                //         this.firstName = arr[0]
                //         this.lastName = arr[1]

                //     }
                // }
                
                //简写 前提：不需要set方法
                nameMerge(){
                    return this.firstName + '-' + this.lastName  
                }
            }
        })
    </script>
</body>
</html>